X870ETaichi Lite not detecting second GPU

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   Hi all, I need help diagnosing issues on my new build that is unable to detect second RTX GPU.

My System
Motherboard: ASRock X870E Taichi Lite 
CPU: AMD Ryzen 7700
RAM: DDR5 ??16 GB ?2 and 32 GB ?2
iGPU: AMD Radeon (integrated)
GPU 1: ASUS Prime RTX 5070 Ti 16 GB (PCIe Slot 3 / PCIe1)
GPU 2: ASUS Prime RTX 5060 Ti 16 GB (PCIe Slot 7 / PCIe2)
M.2 Slot M2_1: Samsung 980 Pro 2 TB
M.2 Slot M2_3: Samsung 990 Evo 4 TB

Issue
The system boots into Windows 11 normally. In Device Manager, only the iGPU (AMD Radeon) and GPU 1 (RTX 5070 Ti) appear.
The second GPU (RTX 5060 Ti) does not show at all?�no errors, no unknown devices, nothing.

I am using the latest NVIDIA Studio driver (591.44) for the 5070 Ti. I am not sure if anything special needs to be done before Windows will detect the second GPU. The 5060 Ti works in another PC, so the card itself is fine.

The GPU is seated properly in PCIe Slot 2. I checked for any obstructions (USB, fan headers, audio headers), and the card fits correctly. The 8-pin PCIe power cable is connected properly; the GPU shows a red LED if no power is attached, so I know the cable is good.

Questions

1. In BIOS, how can I confirm whether the second GPU is being detected (install correctly)?
2. Are there any specific BIOS settings required for dual GPUs?
- I have already enabled Above 4G Decoding
- Enabled Resizable BAR
- Tried Auto and x8/x8 for PCIe lane configuration
- Am I missing any other steps or settings?
3. Can the iGPU affect the detection of the second GPU?
4. Does my second SSD cause the any issue ? (shared lane ?)

Thank you

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changfrancis Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 15 hours 18 minutes ago Status: Offline Points: 15	Post Options Post Reply Quote changfrancis Report Post Thanks(0) Quote Reply Topic: X870ETaichi Lite not detecting second GPU Posted: 13 hours 17 minutes ago at 1:09am
	Hi all, I need help diagnosing issues on my new build that is unable to detect second RTX GPU. My System Motherboard: ASRock X870E Taichi Lite CPU: AMD Ryzen 7700 RAM: DDR5 ??16 GB ?2 and 32 GB ?2 iGPU: AMD Radeon (integrated) GPU 1: ASUS Prime RTX 5070 Ti 16 GB (PCIe Slot 3 / PCIe1) GPU 2: ASUS Prime RTX 5060 Ti 16 GB (PCIe Slot 7 / PCIe2) M.2 Slot M2_1: Samsung 980 Pro 2 TB M.2 Slot M2_3: Samsung 990 Evo 4 TB Issue The system boots into Windows 11 normally. In Device Manager, only the iGPU (AMD Radeon) and GPU 1 (RTX 5070 Ti) appear. The second GPU (RTX 5060 Ti) does not show at all?�no errors, no unknown devices, nothing. I am using the latest NVIDIA Studio driver (591.44) for the 5070 Ti. I am not sure if anything special needs to be done before Windows will detect the second GPU. The 5060 Ti works in another PC, so the card itself is fine. The GPU is seated properly in PCIe Slot 2. I checked for any obstructions (USB, fan headers, audio headers), and the card fits correctly. The 8-pin PCIe power cable is connected properly; the GPU shows a red LED if no power is attached, so I know the cable is good. Questions 1. In BIOS, how can I confirm whether the second GPU is being detected (install correctly)? 2. Are there any specific BIOS settings required for dual GPUs? - I have already enabled Above 4G Decoding - Enabled Resizable BAR - Tried Auto and x8/x8 for PCIe lane configuration - Am I missing any other steps or settings? 3. Can the iGPU affect the detection of the second GPU? 4. Does my second SSD cause the any issue ? (shared lane ?) Thank you